"""
Script 01 – Inspect raw input files.

Prints metadata (encoding, separator, column names, sample rows) for every CSV
in the raw/ folder and saves a JSON report to data/raw_index/.
"""

import json
import sys
from pathlib import Path

ROOT = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(ROOT))

from src.routing_engine.config import DEFAULT_CONFIG
from src.routing_engine.inspect_files import inspect_all

cfg = DEFAULT_CONFIG

print(f"Inspecting files in: {cfg.raw_dir}\n")
meta = inspect_all(cfg.raw_dir)

for name, info in meta.items():
    print(f"-- {name} -------------------------------------------")
    if "error" in info:
        print(f"   ERROR: {info['error']}")
        continue
    print(f"   Encoding  : {info['encoding']}")
    print(f"   Separator : {repr(info['separator'])}")
    print(f"   Columns   : {info['columns']}")
    if info["sample_rows"]:
        print(f"   First row : {info['sample_rows'][0]}")
    print()

# Save report
out = cfg.raw_index_dir / "file_inventory.json"
cfg.raw_index_dir.mkdir(parents=True, exist_ok=True)
with open(out, "w", encoding="utf-8") as f:
    json.dump(meta, f, ensure_ascii=False, indent=2, default=str)

print(f"Report saved -> {out}")